How many types of SLR lenses are there, and which ones can be freely adjusted for distance and distance?

SLR lenses are divided into several categories such as zoom lenses, fixed focus lenses, macro, tilt-shift, and soft focus.

Zoom lenses can be divided into wide-angle, standard zoom, telephoto zoom, etc.

Described below:

Zoom lenses can be divided into: wide-angle, standard, telephoto, etc.

Wide-angle zoom: When taking extremely wide photos, the first choice is a wide-angle zoom lens. Even small changes in focal length can produce extraordinary results.

Standard zoom: A commonly used lens that can take ideal photos from the wide-angle end to the telephoto end. Suitable for beginner photographers, it can take both portraits and landscapes into consideration.

Telephoto zoom: You can instantly zoom in on distant objects and fully experience the bold framing and stunning background blur unique to telephoto zoom lenses.

Fixed focus lenses can be divided into wide-angle, standard, medium telephoto, telephoto, super telephoto, etc.:

Wide-angle fixed focus: can shoot scenes beyond the normal viewing angle, The fisheye lens can capture a wider viewing angle of 180 degrees.

Standard fixed focus: The charm of a standard fixed focus lens lies in its true and excellent imaging capabilities, which is suitable for shooting various scenes from portraits to landscapes.

Mid-telephoto fixed focus: It can bring the subject closer, create an excellent background blur effect, and even use a faster shutter speed to freeze the action.

Telephoto fixed focus: It can not only bring distant subjects closer at high magnification, but also greatly blur the background, thereby taking photos that highlight the subject.

Super telephoto fixed focus: Whether you are shooting wildlife or sports scenes, the depiction of reality is unmatched by other lenses.

Portrait: suitable for shooting with fixed focus lens 50mm (commonly known as lens head), 85mm, and 135mm.

Landscape: Suitable for shooting with wide-angle fixed focus (such as 14mm, 20mm, 24mm) and wide-angle zoom (such as 15~85mm, 17~55mm) lenses.

Macro: Taking Canon as an example, there are six models,

EF 50mm f/2.5 small macro, close-up photography with a magnification of 0.5x.

EF-S 60mmf/2.8 USM is a macro fixed-focus lens designed and developed specifically for EOS digital SLR cameras with APS-C size sensors. It can take macro photos that are enlarged to the original size.

MP-E 65mm f/2.8 1-5X This is a macro lens that can achieve an image larger than 1x without any accessories. It is an ideal tool for photographing small objects.

When using the old BiMicro EF 100mm f/2.8 USM for macro photography, the maximum magnification can reach 1:1. At this time, the internal focusing system ensures a working distance of 149mm.

The new L-head EF 100mm f/2.8L IS USM is a mid-telephoto macro lens equipped with a dual IS image stabilizer that can produce good results in macro photography. It is based on the "EF 100mm f/2.8 USM Macro" with a good reputation, and further improves its optical performance. With the introduction of a waterproof and dust-proof structure, this lens eventually became an L lens.

EF 180mm f/3.5L USM is a mid-telephoto macro lens with 1x magnification. Suitable for long-distance full-size shooting without disturbing the subject (such as insects, etc.). The internal floating focus system reduces dispersion fluctuations caused by focusing, keeping images perfectly clear and sharp.

Also taking Canon as an example*** there are four tilt-shift lenses:

TS-E 17mm f/4L 17mm ultra-wide-angle tilt-shift lens to meet the shooting needs of architectural photographers . ±6.5° tilt operation can be performed to adjust the depth of field; ±12mm offset operation can be performed to control deformation; the tilt angle and offset direction can be adjusted up to 90°, and both the tilt angle and offset can be rotated; the rotation can be adjusted up to ± 90°; Large knobs and levers make operation easier.

TS-E 24mm f/3.5L II wide-angle tilt-shift lens meets the shooting needs of architectural and landscape photographers.

TS-E 45mm f/2.8 The 45mm focal length can take photos with more natural landscape angles.

TS-E 90mm f/2.8 This lens is suitable for shooting various subjects such as product advertisements or portraits.

Soft focus lens: suitable for portrait shooting. The photos taken with this lens are very different from the effects of camera movement or incorrect focus. It uses deliberately designed spherical aberration to make the subject clear in focus, soft and beautiful. The soft focus effect varies depending on the aperture size and the special adjustment device. Due to the spherical aberration of the lens, the color performance will decrease when using the soft focus effect. A true soft-focus lens will have a diffusion effect of bright light when shooting with backlight. In addition, the diffusion of light points will be beautiful when shooting with backlight sources, especially when shooting night scenes, the effect will be stronger. Using backlight can create a dreamy visual effect.

The zoom lens can freely adjust the distance and distance, but the focal length of each lens is different.

Hope this helps.